Wind speed simulation calibration device based on laser Doppler technology

Abstract

The invention relates to the technical field of wind speed simulation, in particular to a wind speed simulation calibration device based on a laser Doppler technology, which comprises a base, a wind speed simulator is fixedly connected to the right side of the top of the base, a rack is fixedly connected to the top of the base, and a wind speed indicator connecting mechanism is fixedly connected to the outer wall of the rack. By arranging the double-shaft motor and the sealing piece, when wind speed simulation calibration needs to be carried out, the double-shaft motor can be started to enable a gear at the output end of the front end of the double-shaft motor to rotate, and then the two sides of the outer wall of the gear are meshed with outer tooth blocks fixed to the outer walls of the two rotating shafts to enable the two rotating shafts to rotate at the same time; the two groups of sealing sheets are opened at the same time, wind tunnels formed in the two wind tunnel connecting main boards are exposed, an anemograph probe can be conveniently inserted for calibration, after the anemograph probe is inserted, the two groups of sealing sheets can be tightly attached to the outer wall of the anemograph probe, the sealing effect is achieved, and leakage of airflow in the wind tunnels is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of wind speed simulation, and more specifically to a wind speed simulation calibration device based on laser Doppler technology. Background Art

[0002] Wind speed is one of the important meteorological data. Online monitoring of wind speed has important application value in various fields of national economic construction, such as agriculture, transportation, construction, and water conservancy projects. With the development of social economy, the advancement of detection technology, and the improvement of people's requirements for the environment, people have higher and higher requirements for the measurement accuracy and function of wind speed measuring devices. Anemometer is one of the main measuring devices for measuring wind speed. It mainly includes anemometer body and probe. The probe transmits the collected flow velocity signal to the anemometer body. The anemometer body converts the flow velocity signal into an electrical signal and displays it in numerical form, thereby realizing the measurement of wind speed.

[0003] According to the patent document: CN208672672U, a wind speed meter calibration device is disclosed, including a frame, a wind tunnel fixedly arranged on the frame, and a clamping device arranged on the outer wall of the wind tunnel, the wind tunnel has an air inlet and an air outlet, a blast assembly is arranged at the air inlet, a notch connected to the outside is arranged on the wind tunnel, a sealing member is detachably arranged at the notch, a groove for the probe to extend into is arranged on the sealing member, a rotating ring is also sleeved on the outer wall of the wind tunnel, and a plurality of slots of different sizes are arranged at intervals on one side of the rotating ring close to the clamping device; the advantages are good sealing and high calibration accuracy;

[0004] The anemometer needs to be calibrated after being used for a period of time. The wind speed simulation calibration device generally includes a frame and a wind tunnel with an air inlet and an air outlet. The wind tunnel is fixed on the frame, and an air blower assembly is provided at the air inlet. An opening for the probe to be inserted and a clamping device for clamping the probe are provided on the side wall of the wind tunnel. When in use, the detection end of the probe is inserted into the wind tunnel from the opening, and the probe is fixed by the clamping device. The wind speed in the wind tunnel is adjusted by the air blower assembly, and the probe transmits the collected flow velocity signal to the anemometer body. At the same time, the wind speed is collected by a laser Doppler wind speed probe, and the value measured by the laser Doppler wind speed probe is compared with the value measured by the anemometer to determine whether the measurement accuracy of the anemometer is accurate. However, the frames of some wind speed simulation calibration devices have openings. When the anemometer does not need to be calibrated, the wind tunnel is usually in an open state. However, during the non-calibration working period, the wind tunnel is in an open state, which makes its interior vulnerable to environmental factors such as dust and moisture, thereby affecting the performance and measurement accuracy of the calibration device. In addition, if it is not used for a long time, some impurities may accumulate in the wind tunnel, such as spider webs. The presence of these impurities will further affect the accuracy of the wind speed simulation calibration. When calibration is not required, the laser emission point of the laser Doppler wind speed probe is not blocked. Long-term exposure to the outside can easily cause damage to the laser emission head and shorten its service life. In addition, after the anemometer probe is inserted, some wind speed simulation calibration devices do not have a sealing structure, which may cause the airflow in the wind tunnel to leak out, further affecting the accuracy and stability of the calibration. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a wind speed simulation calibration device based on laser Doppler technology. The technical problem to be solved by the present invention is that the wind tunnels opened on the frames of some wind speed simulation calibration devices are usually in an open state when the anemometer does not need to be calibrated. However, during the non-calibration working period, the wind tunnel is in an open state, which will make its interior easily affected by environmental factors such as dust and moisture, thereby affecting the performance and measurement accuracy of the calibration device. In addition, if it is not used for a long time, some impurities such as spider webs may accumulate in the wind tunnel. The presence of these impurities will further affect the accuracy of the wind speed simulation calibration. When calibration is not required, the laser emission point of the laser Doppler wind speed probe is not blocked, and long-term exposure to the outside may easily cause damage to the laser emission head, shortening its service life. In addition, after the anemometer probe is inserted, some wind speed simulation calibration devices are not provided with a sealing structure, which may cause the airflow in the wind tunnel to leak out, further affecting the accuracy and stability of the calibration.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] The wind speed simulation calibration device based on laser Doppler technology comprises a base, a wind speed simulator is fixedly connected to the right side of the top of the base, a frame is fixedly connected to the top of the base, and an anemometer connection mechanism is fixedly connected to the outer wall of the frame;

[0008] The wind speed simulator includes a wind speed simulator base, a motor is fixedly connected to the top front side of the wind speed simulator base, a transmission shaft is fixedly connected to the output end of the motor, a track is sleeved on the outer wall of the transmission shaft, a second transmission shaft is sleeved on the rear inner wall of the track, a fan blade is fixedly connected to the inner wall of the second transmission shaft, a fan blade is fixedly connected to the inner wall of the fan blade with a fan blade rotating rod, a reduction box is movably connected to the right side of the outer wall of the fan blade rotating rod, and the bottom of the reduction box is fixedly connected to the top rear side of the wind speed simulator base.

[0009] As a further solution of the present invention: the frame includes a through pipe, and an air inlet and an air outlet are respectively opened at the left and right ends of the through pipe.

[0010] As a further solution of the present invention: the anemometer connecting mechanism includes a laser Doppler anemometer placement box, the inner wall of the laser Doppler anemometer placement box is fixedly connected with a laser Doppler anemometer, the front end of the laser Doppler anemometer is fixedly connected with a laser Doppler detection head, the right side of the laser Doppler anemometer placement box is fixedly connected with a laser Doppler detection head base, the line of the laser Doppler anemometer extends to the outer wall of the laser Doppler anemometer placement box and is fixedly connected with the laser Doppler detection head, and the bottom of the laser Doppler detection head is fixedly connected to the top of the laser Doppler detection head base.

[0011] As a further solution of the present invention: a wind tunnel connecting plate is fixedly connected to the rear side of the laser Doppler detection head base, an outer wall of the wind tunnel connecting plate is fixedly connected to the outer wall of the through pipe, and a sealing frame is fixedly connected to the right side of the front side of the wind tunnel connecting plate.

[0012] As a further solution of the present invention: the wind tunnel connecting plate includes two wind tunnel connecting main boards, and wind tunnels are opened on the front and rear sides of the two wind tunnel connecting main boards. The inner wall of the left wind tunnel connecting main board is fixedly connected to the front side of the outer wall of the laser Doppler detection head through the opened wind tunnel, and circular axis-shaped slide grooves are opened on the rear sides of the inner walls of the two wind tunnel connecting main boards. The inner walls of the two circular axis-shaped slide grooves are slidably connected with circular axis-shaped sliding shafts, and the front sides of the two circular axis-shaped sliding shafts are fixedly connected with rotating shafts.

[0013] As a further solution of the present invention: sealing plate grooves are respectively opened on the four sides of the inner walls of the two rotating shafts, a plurality of inner tooth blocks are respectively fixedly connected to the four sides of the inner walls of the two rotating shafts away from the sealing plate grooves, and a plurality of outer tooth blocks are fixedly connected to one side of the outer walls of the two rotating shafts.

[0014] As a further solution of the present invention: the rear sides of the inner walls of the two wind tunnel connection main boards are rotatably connected with sealing plates on the four sides of the inner wall of the rotating shaft, the outer walls of the two groups of sealing plates are fixedly connected with a plurality of sealing plate tooth blocks, the plurality of sealing plate tooth blocks fixed on the outer walls of the two groups of sealing plates are engaged with the internal tooth blocks fixed on the four sides of the inner wall of the rotating shaft, and the opposite surfaces of the two wind tunnel connection main boards are both hollow designs.

[0015] As a further solution of the present invention: the opposite surfaces of the two wind tunnel connection main boards are fixedly connected with dual-axis motors, the front end of the output end of the dual-axis motor is fixedly connected with a gear, the outer walls of the gears are respectively meshed with multiple external tooth blocks fixed on the outer walls of the two rotating shafts, the front end output end of the dual-axis motor is fixedly connected with a conical tooth, and the outer wall of the conical tooth meshes with a second conical tooth.

[0016] As a further solution of the present invention: the sealing frame includes a sealing frame plate, the rear side of the sealing frame plate is fixedly connected to the front side of the right wind tunnel connecting main board, the front side of the sealing frame plate is provided with an insertion port, and the insertion port is aligned with the wind tunnel opened by the right wind tunnel connecting main board.

[0017] As a further scheme of the present invention: the upper and lower sides of the front side of the sealing frame plate are respectively fixedly connected with a slide groove plate, the front sides of the two slide groove plates are slidably connected with a push-pull plate, the front sides of the two push-pull plates are respectively provided with inclined slide grooves with opposite inclinations, and the opposite surfaces of the two push-pull plates are fixedly connected with a sealing clamp, the left and right sides of the front side of the sealing frame plate are fixedly connected with a second slide groove plate, the second slide groove plate is slidably connected with an inclined sliding rod push plate, the top and bottom of the right side of the inclined sliding rod push plate are respectively fixedly connected with an inclined sliding plate with opposite inclinations, the outer walls of the two inclined sliding plates are slidably connected to the inner wall of the inclined slide groove, the left side of the inclined sliding rod push plate is movably connected with a screw rod, the outer wall of the screw rod is movably connected with a screw rod frame, the rear side of the screw rod frame is fixedly connected to the front side of the sealing frame plate, and the side of the outer wall of the screw rod away from the screw rod frame is threadedly connected to the inner wall of the second conical tooth.

[0018] The beneficial effects of the present invention are:

[0019] 1. The present invention is provided with a dual-axis motor and a sealing sheet. When wind speed simulation calibration is required, the dual-axis motor can be started to rotate the gear at the front output end of the dual-axis motor, and then the outer tooth blocks fixed with the outer walls of the two rotating shafts on both sides of the gear outer wall are meshed, so that the two rotating shafts rotate simultaneously, and then the two sets of sealing sheets are opened at the same time, exposing the wind tunnels opened on the two wind tunnel connection main board, so that the anemometer probe can be inserted for calibration. After the anemometer probe is inserted, the two sets of sealing sheets will fit tightly with the outer wall of the anemometer probe to achieve a sealing effect, avoid leakage of airflow in the wind tunnel, and ensure the accuracy and stability of the calibration. When wind speed simulation calibration is not needed, the dual-axis motor can be started again to close the two sets of sealing sheets again to cover the wind tunnel, prevent environmental factors such as dust and moisture from entering the wind tunnel, avoid accumulation of impurities in the wind tunnel, keep the wind speed simulation calibration device clean, and further ensure the accuracy and stability of the calibration.

[0020] 2. The present invention is provided with a push-pull plate and a sealing clamp. After the anemometer probe is inserted, the screw rod can be rotated to make the inclined sliding rod push plate slide along the second slide groove plate with the cooperation of the screw rod frame and the second slide groove plate, and then the inclined sliding plates at the top and bottom of the right side of the inclined sliding rod push plate slide in the inclined slide grooves opened on the front sides of the two push-pull plates respectively, so that the two push-pull plates are close to each other, and then the two sealing clamps are tightly fitted with the outer wall of the anemometer probe, further enhancing the sealing effect, preventing the airflow in the wind tunnel from leaking, and improving the accuracy and stability of calibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the main three-dimensional structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure of the wind speed simulator of the present invention;

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the frame of the present invention;

[0024] Figure 4 It is a schematic diagram of the three-dimensional structure of the wind speed connection mechanism of the present invention;

[0025] Figure 5 It is a schematic diagram of the three-dimensional separation structure of the wind speed connection mechanism and the sealing frame of the present invention;

[0026] Figure 6 It is a schematic diagram of the three-dimensional sectional separation structure of the wind tunnel connection plate of the present invention;

[0027] Figure 7 A is an enlarged structural schematic diagram of the present invention;

[0028] Figure 8 It is a schematic diagram of the three-dimensional structure of the sealing frame of the present invention.

[0029] In the figure: 1. base; 2. wind speed simulator; 21. wind speed simulator base; 22. motor; 23. transmission shaft; 24. crawler; 25. second transmission shaft; 26. fan blade; 27. fan blade rotating rod; 28. reduction box; 3. frame; 31. through pipe; 32. air inlet; 33. air outlet; 4. anemometer connecting mechanism; 41. laser doppler anemometer placement box; 42. laser doppler anemometer; 43. laser doppler detection head; 44. laser doppler detection head base; 45. wind tunnel connecting plate; 451. wind tunnel connecting main board; 452. circular shaft slide; 453. Wind tunnel; 454, circular shaft sliding shaft; 455, rotating shaft; 456, sealing plate groove; 457, inner gear block; 458, outer gear block; 459, sealing plate; 4510, sealing plate gear block; 4511, dual-axis motor; 4512, gear; 4513, conical gear; 4514, second conical gear; 46, sealing frame; 461, sealing frame plate; 462, insertion port; 463, slide plate; 464, push-pull plate; 465, inclined slide; 466, sealing clamp; 467, second slide plate; 468, screw rack; 469, inclined slide push plate; 4610, inclined slide plate; 4611, screw. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] like Figure 1-8 As shown, the present invention provides a wind speed simulation calibration device based on laser Doppler technology, including a base 1, a wind speed simulator 2 is fixedly connected to the top right side of the base 1, a frame 3 is fixedly connected to the top of the base 1, and an anemometer connecting mechanism 4 is fixedly connected to the outer wall of the frame 3.

[0032] like Figure 2-3 As shown, the wind speed simulator 2 includes a wind speed simulator base 21, a motor 22 is fixedly connected to the top front side of the wind speed simulator base 21, a transmission shaft 23 is fixedly connected to the output end of the motor 22, a track 24 is sleeved on the outer wall of the transmission shaft 23, a second transmission shaft 25 is sleeved on the inner wall of the rear side of the track 24, a fan blade 26 is fixedly connected to the inner wall of the second transmission shaft 25, a fan blade 26 is fixedly connected to the inner wall of the fan blade 26, a fan blade rotating rod 27 is fixedly connected to the outer wall of the fan blade rotating rod 27, a reduction box 28 is movably connected to the right side of the outer wall, and the bottom of the reduction box 28 is fixedly connected to the top rear side of the wind speed simulator base 21, and the frame 3 includes a through pipe 31, and an air inlet 32 ​​and an air outlet 33 are respectively opened at the left and right ends of the through pipe 31;

[0033] When wind speed simulation and calibration operations are required, the user can adjust the parameters of the wind speed simulator 2 according to actual needs. First, by controlling the rotation speed of the motor 22, the rotation speed of the crawler 24 and the second transmission shaft 25 can be adjusted, thereby changing the rotation speed of the blades 26. Since the blades 26 are connected to the blade rotating rod 27, and the blade rotating rod 27 is connected to the transmission shaft 23 through the reduction box 28, the rotation speed of the blades 26 can be more accurately controlled after the speed of the motor 22 is reduced by the reduction box 28, thereby realizing accurate simulation of the wind speed.

[0034] like Figure 4-8As shown, the anemometer connecting mechanism 4 includes a laser Doppler anemometer placement box 41, the inner wall of the laser Doppler anemometer placement box 41 is fixedly connected with a laser Doppler anemometer 42, the front end of the laser Doppler anemometer 42 is fixedly connected with a laser Doppler detection head 43, the right side of the laser Doppler anemometer placement box 41 is fixedly connected with a laser Doppler detection head base 44, the line of the laser Doppler anemometer 42 extends to the outer wall of the laser Doppler anemometer placement box 41 and is fixedly connected with the laser Doppler detection head 43, the bottom of the laser Doppler detection head 43 is fixedly connected to the top of the laser Doppler detection head base 44, and the rear side of the laser Doppler detection head base 44 is fixedly connected with a wind tunnel connecting plate 45, The outer wall of the wind tunnel connecting plate 45 is fixedly connected to the outer wall of the through pipe 31, and a sealing frame 46 is fixedly connected to the right side of the front side of the wind tunnel connecting plate 45. The wind tunnel connecting plate 45 includes two wind tunnel connecting main boards 451. Wind tunnels 453 are provided on the front and rear sides of the two wind tunnel connecting main boards 451. The inner wall of the left wind tunnel connecting main board 451 is fixedly connected to the front side of the outer wall of the laser Doppler detection head 43 through the opened wind tunnel 453. Circular shaft-shaped sliding grooves 452 are provided on the rear sides of the inner walls of the two wind tunnel connecting main boards 451. Circular shaft-shaped sliding shafts 454 are slidably connected to the inner walls of the two circular shaft-shaped sliding grooves 452. Rotating shafts 455 are fixedly connected to the front sides of the two circular shaft-shaped sliding shafts 454. Sealing sheet grooves 456 are provided on the four sides of the inner walls of the two rotating shafts 455. The four sides of the inner wall of the rotating shaft 455 away from the sealing sheet groove 456 are respectively fixedly connected with a plurality of inner tooth blocks 457, and one side of the outer wall of the two rotating shafts 455 is fixedly connected with a plurality of outer tooth blocks 458. The rear side of the inner wall of the two wind tunnel connecting main boards 451 is rotatably connected with sealing sheets 459 on the four sides of the inner wall of the rotating shaft 455, and the outer walls of the two groups of sealing sheets 459 are fixedly connected with a plurality of sealing sheet tooth blocks 4510. The plurality of sealing sheet tooth blocks 4510 fixed on the outer walls of the two groups of sealing sheets 459 are meshed with the inner tooth blocks 457 fixed on the four sides of the inner wall of the rotating shaft 455. The opposite sides of the two wind tunnel connecting main boards 451 are both hollow designs, and the opposite sides of the two wind tunnel connecting main boards 451 are fixedly connected with a dual-axis motor 4511, and the output end of the dual-axis motor 4511 A gear 4512 is fixedly connected to the front end, and both sides of the outer wall of the gear 4512 are respectively meshed with multiple external gear blocks 458 fixed to the outer walls of the two rotating shafts 455. A conical tooth 4513 is fixedly connected to the front output end of the dual-axis motor 4511, and the outer wall of the conical tooth 4513 meshes with the second conical tooth 4514. The sealing frame 46 includes a sealing frame plate 461, and the rear side of the sealing frame plate 461 is fixedly connected to the front side of the right wind tunnel connecting main board 451. An insertion port 462 is opened on the front side of the sealing frame plate 461, and the insertion port 462 is aligned with the wind tunnel 453 opened on the right wind tunnel connecting main board 451. The upper and lower sides of the front side of the sealing frame plate 461 are respectively fixedly connected with a slide plate 463, and the front sides of the two slide plates 463 are slidably connected with a push-pull plate 464.The front sides of the two push-pull plates 464 are respectively provided with inclined sliding grooves 465 with opposite inclinations, and the opposite surfaces of the two push-pull plates 464 are fixedly connected with sealing clamps 466, and the left and right sides of the front side of the sealing frame plate 461 are fixedly connected with second sliding groove plates 467, and the second sliding groove plate 467 is slidably connected with an inclined sliding rod push plate 469, and the top and bottom of the right side of the inclined sliding rod push plate 469 are respectively fixedly connected with inclined slide plates 4610 with opposite inclinations, and the outer walls of the two inclined slide plates 4610 are slidably connected to the inner walls of the inclined sliding grooves 465, and the left side of the inclined sliding rod push plate 469 is movably connected with a screw rod 4611, and the outer wall of the screw rod 4611 is movably connected with a screw rod frame 468, and the rear side of the screw rod frame 468 is fixedly connected to the front side of the sealing frame plate 461, and the side of the outer wall of the screw rod 4611 away from the screw rod frame 468 is threadedly connected to the inner wall of the second conical tooth 4514;

[0035] When the anemometer needs to be calibrated, first insert the anemometer probe into the inner wall of the right wind tunnel connecting main board 451 through the insertion port 462 opened by the sealing frame plate 461, and then start the dual-axis motor 4511. When the dual-axis motor 4511 is started, its front output end first drives the gear 4512 to rotate. Since the outer walls of the gear 4512 are respectively meshed with the multiple external tooth blocks 458 fixed to the outer walls of the two rotating shafts 455, the rotation of the gear 4512 will drive the two rotating shafts 455 to rotate synchronously in their respective circular shaft-shaped slide grooves 452. 455 rotates, and the inner tooth blocks 457 fixed on the four sides of the inner wall will drive the sealing sheet tooth blocks 4510 meshing therewith, thereby pushing the sealing sheet 459 to rotate at the rear side of the inner wall of the wind tunnel connecting main board 451. The rotation of the sealing sheet 459 opens the wind tunnel 453, so that the detection head of the anemometer can smoothly enter the wind tunnel 453, and then the wind speed detection is carried out. At the same time, the wind tunnel 453 opened on the inner wall of the left wind tunnel connecting main board 451 is opened, which will ensure that the front side of the laser Doppler detection head 43 is in an open state, so as to carry out accurate laser Doppler wind speed detection.

[0036] At the same time, the other output end of the dual-axis motor 4511 converts the rotational motion into the linear motion of the screw rod 4611 through the meshing of the conical tooth 4513 and the second conical tooth 4514. Under the constraint of the screw rod frame 468, the screw rod 4611 transmits the linear motion to the inclined sliding rod push plate 469. The two inclined sliding plates 4610 on the inclined sliding rod push plate 469 slide in the inclined sliding grooves 465 opened on the front sides of the two push-pull plates 464, respectively, thereby pushing the two push-pull plates 464 to slide in the sliding groove plate 463. As the push-pull plates 464 slide, the two sealing clamps 466 will gradually approach or move away from the insertion port 462, thereby achieving tight clamping or release of the anemometer detection head. This design ensures the stability and safety of the anemometer detection head during the insertion and removal process. Moreover, since the two sealing clamps 466 are made of rubber material, they have good sealing performance, which can effectively prevent outside air or dust from entering the wind tunnel, thereby ensuring the accuracy of wind speed detection.

[0037] Working principle of the present invention: When wind speed simulation and calibration operations are required, the user can adjust the parameters of the wind speed simulator 2 according to actual needs. First, by controlling the rotation speed of the motor 22, the rotation speed of the crawler 24 and the second transmission shaft 25 can be adjusted, thereby changing the rotation speed of the blades 26. Since the blades 26 are connected to the blade rotating rod 27, and the blade rotating rod 27 is connected to the transmission shaft 23 through the reduction box 28, the rotation speed of the blades 26 can be more accurately controlled after the speed of the motor 22 is reduced by the reduction box 28, thereby realizing accurate simulation of the wind speed;

[0038] When the anemometer needs to be calibrated, the anemometer probe is first inserted into the inner wall of the right wind tunnel connecting main board 451 through the insertion port 462 provided on the sealing frame plate 461, and then the dual-axis motor 4511 is started. When the dual-axis motor 4511 is started, its front output end first drives the gear 4512 to rotate. Since the outer walls of the gear 4512 are respectively meshed with the multiple outer tooth blocks 458 fixed to the outer walls of the two rotating shafts 455, the rotation of the gear 4512 will drive the two rotating shafts 455 to rotate in their respective circles. The shaft 455 rotates synchronously in the axial slide groove 452. As the shaft 455 rotates, the inner tooth blocks 457 fixed on the four sides of the inner wall will drive the sealing piece tooth blocks 4510 meshing therewith, thereby pushing the sealing piece 459 to rotate at the rear side of the inner wall of the wind tunnel connecting main board 451. The rotation of the sealing piece 459 opens the wind tunnel 453, so that the detection head of the anemometer can smoothly enter the wind tunnel 453, and then the wind speed detection is carried out. At the same time, the wind tunnel 453 opened on the inner wall of the left wind tunnel connecting main board 451 is opened to ensure that the laser multi-point The front side of the Doppler detection head 43 is in an open state, so as to perform accurate laser Doppler wind speed detection. At the same time, the output end of the other end of the dual-axis motor 4511 is engaged with the conical tooth 4513 and the second conical tooth 4514, converting the rotational motion into the linear motion of the screw rod 4611. The screw rod 4611 is constrained by the screw rod frame 468, and the linear motion is transmitted to the inclined slide rod push plate 469. The two inclined slide plates 4610 on the inclined slide rod push plate 469 are respectively in the inclined slide grooves 44 opened on the front sides of the two push-pull plates 464. 65, thereby pushing the two push-pull plates 464 to slide in the slide groove plate 463. As the push-pull plates 464 slide, the two sealing clamps 466 will gradually approach or move away from the insertion port 462, thereby tightly clamping or releasing the anemometer detection head. This design ensures the stability and safety of the anemometer detection head during the insertion and removal process. In addition, since the two sealing clamps 466 are made of rubber material and have good sealing performance, they can effectively prevent outside air or dust from entering the wind tunnel, thereby ensuring the accuracy of wind speed detection.

[0039] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0040] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A wind speed simulation and calibration device based on laser Doppler technology, comprising a base (1), characterized in that: A wind speed simulator (2) is fixedly connected to the right side of the top of the base (1), a frame (3) is fixedly connected to the top of the base (1), and an anemometer connecting mechanism (4) is fixedly connected to the outer wall of the frame (3); The wind speed simulator (2) comprises a wind speed simulator base (21), a motor (22) is fixedly connected to the front side of the top of the wind speed simulator base (21), a transmission shaft (23) is fixedly connected to the output end of the motor (22), a crawler (24) is sleeved on the outer wall of the transmission shaft (23), a second transmission shaft (25) is sleeved on the inner wall of the rear side of the crawler (24), a fan blade (26) is fixedly connected to the inner wall of the second transmission shaft (25), a fan blade rotating rod (27) is fixedly connected to the inner wall of the fan blade (26), a reduction box (28) is movably connected to the right side of the outer wall of the fan blade rotating rod (27), and the bottom of the reduction box (28) is fixedly connected to the rear side of the top of the wind speed simulator base (21).

2. The wind speed simulation calibration device based on laser Doppler technology according to claim 1, characterized in that: The frame (3) comprises a through pipe (31), and an air inlet (32) and an air outlet (33) are respectively provided at the left and right ends of the through pipe (31).

3. The wind speed simulation calibration device based on laser Doppler technology according to claim 1, characterized in that: The anemometer connection mechanism (4) comprises a laser Doppler anemometer placement box (41), the inner wall of the laser Doppler anemometer placement box (41) is fixedly connected to a laser Doppler anemometer (42), the front end of the laser Doppler anemometer (42) is fixedly connected to a laser Doppler detection head (43), the right side of the laser Doppler anemometer placement box (41) is fixedly connected to a laser Doppler detection head base (44), the line of the laser Doppler anemometer (42) extends to the outer wall of the laser Doppler anemometer placement box (41) and is fixedly connected to the laser Doppler detection head (43), and the bottom of the laser Doppler detection head (43) is fixedly connected to the top of the laser Doppler detection head base (44).

4. The wind speed simulation calibration device based on laser Doppler technology according to claim 3 is characterized in that: A wind tunnel connection plate (45) is fixedly connected to the rear side of the laser Doppler detection head base (44), an outer wall of the wind tunnel connection plate (45) is fixedly connected to the outer wall of the through pipe (31), and a sealing frame (46) is fixedly connected to the right side of the front side of the wind tunnel connection plate (45).

5. The wind speed simulation calibration device based on laser Doppler technology according to claim 4, characterized in that: The wind tunnel connecting plate (45) comprises two wind tunnel connecting main boards (451), and wind tunnels (453) are provided on both the front and rear sides of the two wind tunnel connecting main boards (451). The inner wall of the left wind tunnel connecting main board (451) is fixedly connected to the front side of the outer wall of the laser Doppler detection head (43) through the wind tunnel (453). The rear sides of the inner walls of the two wind tunnel connecting main boards (451) are provided with circular shaft-shaped sliding grooves (452), and the inner walls of the two circular shaft-shaped sliding grooves (452) are slidably connected to circular shaft-shaped sliding shafts (454), and the front sides of the two circular shaft-shaped sliding shafts (454) are fixedly connected to rotating shafts (455).

6. The wind speed simulation calibration device based on laser Doppler technology according to claim 5, characterized in that: Sealing plate grooves (456) are respectively provided on the four sides of the inner walls of the two rotating shafts (455), a plurality of inner tooth blocks (457) are respectively fixedly connected to the four sides of the inner walls of the two rotating shafts (455) away from the sealing plate grooves (456), and a plurality of outer tooth blocks (458) are respectively fixedly connected to one side of the outer walls of the two rotating shafts (455).

7. The wind speed simulation calibration device based on laser Doppler technology according to claim 5, characterized in that: The rear sides of the inner walls of the two wind tunnel connecting main boards (451) are rotatably connected to the four sides of the inner wall of the rotating shaft (455) with sealing plates (459), and the outer walls of the two groups of sealing plates (459) are fixedly connected to a plurality of sealing plate tooth blocks (4510). The plurality of sealing plate tooth blocks (4510) fixed to the outer walls of the two groups of sealing plates (459) are meshed with the inner tooth blocks (457) fixed to the four sides of the inner wall of the rotating shaft (455). The opposite surfaces of the two wind tunnel connecting main boards (451) are both hollow designs.

8. The wind speed simulation calibration device based on laser Doppler technology according to claim 7, characterized in that: The opposite surfaces of the two wind tunnel connection main boards (451) are fixedly connected with a dual-axis motor (4511), the front end of the output end of the dual-axis motor (4511) is fixedly connected with a gear (4512), the outer wall of the gear (4512) is respectively meshed with a plurality of external gear blocks (458) fixed to the outer walls of the two rotating shafts (455), the front end output end of the dual-axis motor (4511) is fixedly connected with a conical tooth (4513), the outer wall of the conical tooth (4513) is meshed with a second conical tooth (4514).

9. The wind speed simulation calibration device based on laser Doppler technology according to claim 4, characterized in that: The sealing frame (46) comprises a sealing frame plate (461), the rear side of the sealing frame plate (461) is fixedly connected to the front side of the right wind tunnel connecting main board (451), and the front side of the sealing frame plate (461) is provided with an insertion opening (462), and the insertion opening (462) is aligned with the wind tunnel (453) opened on the right wind tunnel connecting main board (451).

10. The wind speed simulation and calibration device based on laser Doppler technology according to claim 9, characterized in that: The upper and lower sides of the front side of the sealing frame plate (461) are respectively fixedly connected with a slide plate (463), the front sides of the two slide plates (463) are slidably connected with a push-pull plate (464), the front sides of the two push-pull plates (464) are respectively provided with an inclined slide groove (465) with opposite inclinations, the opposite surfaces of the two push-pull plates (464) are fixedly connected with a sealing clamp (466), the left and right sides of the front side of the sealing frame plate (461) are fixedly connected with a second slide plate (467), the second slide plate (467) is slidably connected with an inclined slide rod push plate (469), and the inclined slide rod push plate (469) is fixedly connected with the sealing frame plate (461). The top and bottom of the right side of 69 are respectively fixedly connected with inclined slides (4610) with opposite inclinations, and the outer walls of the two inclined slides (4610) are slidably connected to the inner wall of the inclined slide groove (465). The left side of the inclined slide push plate (469) is movably connected with a screw rod (4611), and the outer wall of the screw rod (4611) is movably connected with a screw rod frame (468), and the rear side of the screw rod frame (468) is fixedly connected to the front side of the sealing frame plate (461), and the side of the outer wall of the screw rod (4611) away from the screw rod frame (468) is threadedly connected to the inner wall of the second conical tooth (4514).

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